Colossus [later called "It, the Living Colossus"]; Crab-Creatures of Cancrius III; Judy; Frank; Charlie; Ben
The crab-creatures of Cancrius III come back to try to take over the earth and begin by taking control of Colossus again. Bob O'Bryan, a scenery designer, comes up with the idea of creating a plaster of paris creature to trick the crab-creatures into taking over. When the crab-creatures foolishly take it over Bob blows it up, destroying them.
A cowardly boy is ashamed when space aliens interrogate him for when would be the best time to invade and he is too frightened to even lie to them. They let him go so he can check the paper for the best time to invade and he regrets his cowardice. When he sees tomorrow is the fourth of July he tells the aliens to invade after nightfall and the fireworks display frightens them off.
A timid hypnotist hypnotizes himself hoping to give himself the daring to succeed in business, but after coming out of his trance, he realizes that the wealth he had thought he accumulated over the course of one year was all in his mind.